<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:f="http://xmlns.jcp.org/jsf/core"
      xmlns:p="http://primefaces.org/ui">

    <f:view contentType="text/html;charset=UTF-8" encoding="UTF-8">
        <h:head/>

        <h:body>
            <h:form id="form">
                <h:panelGroup>
                    Hello
                </h:panelGroup>

                <p:commandButton id="button" value="Submit" update="@previous"
                                 action="#{commandButton001.submit()}"
                                 disableOnAjax="true"/>
            </h:form>
        </h:body>
    </f:view>

</html>